單項選擇題

The frequency of an AC generator is adjusted by means of the （）

A.main alternator field rheostat
B.exciter field rheostat
C.prime mover governor control
D.equalizing reactor

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單項選擇題

When the current flow through a copper wire increases, its （）

A.resistance will decrease
B.insulation will bum
C.temperature will increase
D.conductivity will increase

單項選擇題

When securing an AC generator, you should FIRST （）.

A.open the generator circuit breaker
B.switch the voltage regulator to “manual”
C.decrease the field excitation to minimum
D.reduce the load on the unit